未知题型 在统计学中，样本的统计指标称为统计量，总体的统计指标称为参数

单项选择题 The ________________ is the focus of the song, the emotional and musical climax, and it is where the whole song is delivered, and the part that the listener will remember from the song.

未知题型 由受试者分配不随机所导致实测值与真实值之间的差异属于随机误差